FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.3.0-ballot-tc1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions

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Extension: Target invariant

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-targetInvariant				Version: 5.3.0-ballot-tc1
Standards status: Deprecated		Maturity Level: 2	Responsible: HL7 International / Clinical Decision Support	Computable Name: TargetInvariant
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1694

DEPRECATED: Use the targetConstraint extension instead. Specifies an invariant that is enforced on instantiated resources. This extension can be applied to any element of a definitional resource (such as ActivityDefinition or Measure) and indicates that the invariant should be enforced on resources that are instantiated from the definition. For example, this extension can be used to define a constraint such as numerator count must be less than or equal to denominator count.

This extension allows invariants to be specified as part of definitional resources as an alternative to having to define a profile to enforce the constraint.

Context of Use

This extension may be used on the following element(s)

• Element ID: ActivityDefinition
• Element ID: ActivityDefinition.code
• Element ID: ActivityDefinition.intent (FHIR versions R4 and after)
• Element ID: ActivityDefinition.priority (FHIR versions R4 and after)
• Element ID: ActivityDefinition.doNotPerform (FHIR versions R4 and after)
• Element ID: ActivityDefinition.timing[x]
• Element ID: ActivityDefinition.asNeeded[x] (FHIR versions R5 and after)
• Element ID: ActivityDefinition.location
• Element ID: ActivityDefinition.participant
• Element ID: ActivityDefinition.product[x]
• Element ID: ActivityDefinition.quantity
• Element ID: ActivityDefinition.dosage
• Element ID: ActivityDefinition.bodySite
• Element ID: ActivityDefinition.dynamicValue
• Element ID: Measure
• Element ID: Measure.group
• Element ID: Measure.group.population
• Element ID: Measure.group.stratifier
• Element ID: Measure.supplementalData
• Element ID: PlanDefinition
• Element ID: PlanDefinition.goal
• Element ID: PlanDefinition.goal.target
• Element ID: PlanDefinition.actor (FHIR versions R5 and after)
• Element ID: PlanDefinition.action
• Element ID: Questionnaire
• Element ID: Questionnaire.item

Usage info

Usages:

• This Extension is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

 

Other representations of profile: CSV, Excel, Schematron

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
Extension.extension:severity.​value[x]	Base	required	ConstraintSeverity	📦5.0.0	FHIR Std.

Constraints

Id	Grade	Path(s)	Description	Expression
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children	hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both	extension.exists() != value.exists()

R4B

The extension is unchanged in R4B

R4

The extension is unchanged in R4

R3

The extension is represented a little differently in R3:

• Replace the type Expression with a set of extensions for the content of the type along with the _datatype extension

Name	Flags	Card.	Type	Description & Constraints      Filter: Bindings Constraints Obligations
Extension		0..*	Extension	A constraint on the target resource
Slices for extension				Content/Rules for all slices
extension:key		1..1	Extension	Unique identifier
extension		0 .. 0		Extension
url		1 .. 1	uri	"key"
value[x]		1.. 1	id	Value of extension
extension:requirements		0..1	Extension	Why the invariant is defined
extension		0 .. 0		Extension
url		1 .. 1	uri	"requirements"
value[x]		1.. 1	string	Value of extension
extension:severity		1..1	Extension	error | warning
extension		0 .. 0		Extension
url		1 .. 1	uri	"severity"
value[x]		1.. 1	code	Value of extension Binding: ConstraintSeverity ( required )
extension:expression		1..1	Extension	The invariant expression
Slices for extension		0 ..*	Extension	Extension Slice: Unordered, Open by value:url
extension:_datatype		1..1	(Complex)	DataType name 'Expression' from R5 URL: http://hl7.org/fhir/StructureDefinition/_datatype
value[x]		1.. 1	string	Value of extension Fixed Value: Expression
extension:description		0..1	Extension	Natural language description of the condition
extension		0 .. 0		Extension
url		1 .. 1	uri	"description"
value[x]		1.. 1	string	Value of extension
extension:name		0..1	Extension	Short name assigned to expression for reuse
extension		0 .. 0		Extension
url		1 .. 1	uri	"name"
value[x]		1.. 1	code	Value of extension
extension:language		0..1	Extension	text/cql | text/fhirpath | application/x-fhir-query | etc.
extension		0 .. 0		Extension
url		1 .. 1	uri	"language"
value[x]		1.. 1	code	Value of extension Binding: ExpressionLanguage ( extensible ) : The media type of the expression language. Additional Bindings Purpose MimeTypes Max Binding
extension:expression		0..1	Extension	Expression in specified language
extension		0 .. 0		Extension
url		1 .. 1	uri	"expression"
value[x]		1.. 1	string	Value of extension
extension:reference		0..1	Extension	Where the expression is found
extension		0 .. 0		Extension
url		1 .. 1	uri	"reference"
value[x]		1.. 1	uri	Value of extension
url		1 .. 1	uri	"expression"
value[x]		0 .. 0		Value of extension
url		1 .. 1	uri	"http://hl7.org/fhir/StructureDefinition/cqf-targetInvariant"
value[x]		0 .. 0		Value of extension
Documentation for this format

Search Parameters for this Extension

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